APA (7th ed.) Citation

Blandfor. (1980). Snorkelling manua (3rd edition.). The British Sub-Aqua Clu.

Chicago Style (17th ed.) Citation

Blandfor. Snorkelling Manua. 3rd edition. Englan: The British Sub-Aqua Clu, 1980.

MLA (8th ed.) Citation

Blandfor. Snorkelling Manua. 3rd edition. The British Sub-Aqua Clu, 1980.

Warning: These citations may not always be 100% accurate.